The Shadow 2 already has a lot less pre-travel than the SP-01, but now CZ has now also released a sports disconnector to further improve the trigger travel on the Shadow 2 (also fits the SP-01 Shadow).

http://www.jizni.co.za/trigger-trave...or-shadow.html

One of the functions of the disconnector in a CZ is to hold the trigger in the rearwards resting position in single action mode. While the standard disconnector leaves a healthy amount of pre-travel, the sports disconnector reduces this distance, allowing for easier preparing of the trigger. (Or happier slapping. )